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Simplifying (x + 2)(x + 5) + -1x(4x + -1) = 0 Reorder the terms: (2 + x)(x + 5) + -1x(4x + -1) = 0 Reorder the terms: (2 + x)(5 + x) + -1x(4x + -1) = 0 Multiply (2 + x) * (5 + x) (2(5 + x) + x(5 + x)) + -1x(4x + -1) = 0 ((5 * 2 + x * 2) + x(5 + x)) + -1x(4x + -1) = 0 ((10 + 2x) + x(5 + x)) + -1x(4x + -1) = 0 (10 + 2x + (5 * x + x * x)) + -1x(4x + -1) = 0 (10 + 2x + (5x + x2)) + -1x(4x + -1) = 0 Combine like terms: 2x + 5x = 7x (10 + 7x + x2) + -1x(4x + -1) = 0 Reorder the terms: 10 + 7x + x2 + -1x(-1 + 4x) = 0 10 + 7x + x2 + (-1 * -1x + 4x * -1x) = 0 10 + 7x + x2 + (1x + -4x2) = 0 Reorder the terms: 10 + 7x + 1x + x2 + -4x2 = 0 Combine like terms: 7x + 1x = 8x 10 + 8x + x2 + -4x2 = 0 Combine like terms: x2 + -4x2 = -3x2 10 + 8x + -3x2 = 0 Solving 10 + 8x + -3x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -3 the coefficient of the squared term: Divide each side by '-3'. -3.333333333 + -2.666666667x + x2 = 0 Move the constant term to the right: Add '3.333333333' to each side of the equation. -3.333333333 + -2.666666667x + 3.333333333 + x2 = 0 + 3.333333333 Reorder the terms: -3.333333333 + 3.333333333 + -2.666666667x + x2 = 0 + 3.333333333 Combine like terms: -3.333333333 + 3.333333333 = 0.000000000 0.000000000 + -2.666666667x + x2 = 0 + 3.333333333 -2.666666667x + x2 = 0 + 3.333333333 Combine like terms: 0 + 3.333333333 = 3.333333333 -2.666666667x + x2 = 3.333333333 The x term is -2.666666667x. Take half its coefficient (-1.333333334). Square it (1.777777780) and add it to both sides. Add '1.777777780' to each side of the equation. -2.666666667x + 1.777777780 + x2 = 3.333333333 + 1.777777780 Reorder the terms: 1.777777780 + -2.666666667x + x2 = 3.333333333 + 1.777777780 Combine like terms: 3.333333333 + 1.777777780 = 5.111111113 1.777777780 + -2.666666667x + x2 = 5.111111113 Factor a perfect square on the left side: (x + -1.333333334)(x + -1.333333334) = 5.111111113 Calculate the square root of the right side: 2.260776661 Break this problem into two subproblems by setting (x + -1.333333334) equal to 2.260776661 and -2.260776661.Subproblem 1
x + -1.333333334 = 2.260776661 Simplifying x + -1.333333334 = 2.260776661 Reorder the terms: -1.333333334 + x = 2.260776661 Solving -1.333333334 + x = 2.260776661 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 2.260776661 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 2.260776661 + 1.333333334 x = 2.260776661 + 1.333333334 Combine like terms: 2.260776661 + 1.333333334 = 3.594109995 x = 3.594109995 Simplifying x = 3.594109995Subproblem 2
x + -1.333333334 = -2.260776661 Simplifying x + -1.333333334 = -2.260776661 Reorder the terms: -1.333333334 + x = -2.260776661 Solving -1.333333334 + x = -2.260776661 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -2.260776661 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -2.260776661 + 1.333333334 x = -2.260776661 + 1.333333334 Combine like terms: -2.260776661 + 1.333333334 = -0.927443327 x = -0.927443327 Simplifying x = -0.927443327Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.594109995, -0.927443327}
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